[Animalia] Linnaeus, 1758 - animals
   Chordata Bateson, 1885 - chordates
     Vertebrata Cuvier, 1812 - vertebrates
       Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
         1 †Archaeornithes Gadow, 1893 see Superorder Archaeornithes Gadow, 1893
         2 Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893